Let-off mechanism for looms



Nam m, 1928. I 1,691,884

' l. 0. HUCKS LET-OFF MECHANISM FOR LOOMS Filed Oct. 1.4, 1927 lnvenTor. y 0. Hu

Pass s Nov. 13, ea.

' s'r a'r nearest rarest v IVEY 0. HUGKS, or Bessemer; NORTH 'oAncr-rna, assronon TO Barr ns. consonav'IION, OF HOPEDALE, MASSACELU' SETTS, A CORPOBATEON OF.

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LET-OFF MECHANISIYT EOE LOOMS.

Application filed October 14, 1927. Serial No. 226,105

This invention relates to let-off mechanism for looms and has for its main object to provide a simple and efficientmeans by which the warp beam may be freed from its actu- It is the further object of the invention to provlde such a means which will leave both.

hands of the operator free to manipulate the warp beam.

The nature and objects of the invention will appear more fully from the accompanying description and drawings and will be pointed out in the claims.

This invent-ion has to do with a type of positively driven let-off mechanism. wherein the warp beam is geared to a transmit n shaft, which shaft carries a pinion driven from suitable mechanism connected with the loom, which pinion, when connected to the transmitting shaft, acts thereby to transmit the required rotary movement to the warp beam.

In this invention the gear connection between the warp beam and transmitting shaft is not affected, but a suitable means i pro vided for connecting and disconnecting the pinion to the transmitting shaft and for locking this connecting and disconnecting means inits disconnecting position when required. Thus the operator, after looking the mechanism in disconnecting position, has both hands free to manipulate the warp beam, as in the case of a. pick-out or otherwise, and the pinion also remains connected to the mechanism by which it is driven.

As the invention thus has to do with only tion shown in Fig. 1 taken partially invertical cross section on the line 2-2 of Fig. 1.

Fig. 3 is an enlarged detail in front elevation and partially in cross section Showw ing the transmitting shaft and connected parts. 1

'bodyin Fig. 4i is a view in cross section taken on the line .l 1 of Fig. 3.

in the construct-ion illustraterl. the lct-off mechanism comprises atransmitting shaft .1, preferably extending across the loom and journalled in suitable bearings, such as 2, in the loom sides 3. Thisshaft is provided with a small gear 4% secured thereto as byfthe set screw 5 and this gear meshes with'the usual gear 6 fast on the warp beam '7. A similar gear may be employed, if desired, at the opposite side of the loom.

The operating mechanism is shown as comprising a vertical shaft .8 journalled' in suitable bearing brackets 9 extending from the loom side. This shaft 8 carries a ratchet wheel 10 driven by'a pawl 11 operated from a link 12 extending to a suitable moving part of the 10cm. 7 The shaft Salso carries a worm 1.3 meshing with a worm wheel pinion Mlo'ose on the shaft 1. I

Consequently it will be seen, when the pinion 1 1- is fast to the shaft 1 and the shaft 8 is rotated under the operation of the link 12., that rotary motion will be transmitted to the warp beam, thus securing the let-off action. all in a well known and familiar manner I In the preferred form of construction emn this invention, the shaft 1 at the left of the bearing 2 has secured thereto by ran means of the set screw 15 a'collar 16 and a similar collar 17 is secured by a set screw 18v spaced from the collar 16 to the end of the shaft 1. The pinion 14 isprovided with a hub 19 projecting therefrom toward the col-.

ting over the collar 16. A helical spring 20 abutting the collar 17 and the hub 19 of the pinion 14 serves normally to force the pinion against the collar 16. v

The pinion 14 has secured to its face a U- shaped bridge member 21. clutch pin thus presenting a straight body 22 A hook-shaped- I and laterally extending arm 23 is n'iounted" to slide longitudinally and parallel with the shaft 1,i n the bridge 21 and pinion 14:. This clutch pm is spring-impelled toward the collar 16 by a helical 'spring'24i surrounding the.

pin and abutting the'bridge 21 and a projection 25 on the clutch pin body 22.

The collar'16 is provided with a hole, and preferably with a plurality of holes, 26

spaced at the same distance from the axis of p the shaft 1 as the hole in the pinion through which the clutch pin 22 slides. Thus it will 9b lar 17 and is also provided with a recess fitbe seen that the clutch pin is normally springimpelled so as to pass into a hole 26 and thus connect vthe pinion 14 to the collar 16 and thus to the shaft 1. This is the normal confreed from the shaft 1 and thus the warp beam free to rotate. 7

It will also be seen that the operator having once disconnected the pinion 1 1 from the shaft 1 and locked the clutch pin 22' in retracted position, has both hands free to manipulate the warp beam.

WVhen it is desired to restore theoperation of the let-01f mechanism,the operator simply turns the clutchv pin QQnntil the arm 23 out of line With the bridge 21, when the clutch pin, impelled bv the spring 24, slides into engagement with the hole 26 and the operation of the let-oif mechanism isresumed.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

' 1. A let-off mechanism for looms comprising a transmitting shaft, a warp beam geared to said shaft, 21 pairfof spaced collars fast on said shaft, a driven pinion loose on the shaft and abutting one collar, a spring on the shaft between the pinion and the other collar acting to force the pinion against the first collar, the pinion having a clutch pin mounted to slide therein parallel with the shaft and thefirst collar having-a hole to receive the pin, and a springengaging the pin and acting normally to force it into, and maintain it seated'in, said hole. i

2. A let-off mechanism for looms compri ing the constructiondefined in claim 1, together with means for locking theelutc'h pin in retracted position.

3. A let-off mechanism for looms comprismg the construction defined in claim- 1, in'

which the first collar is provided with a plurality of holes arrangedequidistant from the shaft axis and each adapted to receive the clutch pin whereby the :pinion and collar may be clutched together in various relative rotary positions.

.ln testimony whereof, I have signed my name to this specification.

IVEY o. iiUoKs. 

